Measurement of frequency conversion losses with 3-mixer method for traceable mm-wave power measurement method in D-band

2012 ◽  
Author(s):  
Toshihide Tosaka ◽  
Katsumi Fujii ◽  
Kaori Fukunaga ◽  
Yasushi Matsumoto
Keyword(s):  
Measurement Method ◽  
Frequency Conversion ◽  
Power Measurement ◽  
Wave Power

scholarly journals Prototype of a Dsp-Based Instrument for In-Service Wireless Transmitter Power Measurement

2014 ◽  
Vol 21 (4) ◽  
pp. 699-708
Author(s):  
Leopoldo Angrisani ◽  
Felice Cennamo ◽  
Giovanni Scarpato ◽  
Rosario Schiano Lo Moriello
Keyword(s):  
Spectral Analysis ◽  
Frequency Domain ◽  
Measurement Method ◽  
Radio Channel ◽  
Power Measurement ◽  
Transmitter Power ◽  
Wireless Transmitter ◽  
Wireless Environments ◽  
Power Measurements

Abstract A prototype of a DSP-based instrument for in-service transmitter power measurements is presented. The instrument implements a signal-selective algorithm for power measurements that is suitable for use in wireless environments, where possible uncontrolled interfering sources are present in the radio channel and are overlapped to the signal emitted by the transmitter under test, possibly in both time and frequency domain. The measurement method exploits the principles of cyclic spectral analysis, which are briefly recalled in the paper. Potentialities, as well as limitations of the prototype use are discussed, and the results of experiments with both modulated and unmodulated interfering sources are presented.

scholarly journals Research on Reducer Power Measurement System of Bridge Crane

2018 ◽  
Vol 198 ◽  
pp. 01003
Author(s):  
Zhihao Ge ◽  
Yifei Tong ◽  
Meng Zhong ◽  
Xiangdong Li
Keyword(s):  
Measurement System ◽  
Measurement Method ◽  
Power Measurement ◽  
Measuring System ◽  
Bridge Crane ◽  
Host System

In this paper, the reducer is taken as the research object for power measurement. First, the demand of reducer power measurement is analyzed, and the method for measuring power is determined. Then, in view of the power measurement method adopted by the reducer, the overall framework of the measuring system is carried out, and the host system is designed.

Improvement on Zero Nonlinear Compensation of Time Division Multiplier

2014 ◽  
Vol 687-691 ◽  
pp. 3132-3136
Author(s):  
Wu Zhu ◽  
Juan Juan Yu
Keyword(s):  
Compensation Effect ◽  
Frequency Conversion ◽  
Zero Point ◽  
Power Measurement ◽  
Test Results ◽  
Conversion Method ◽  
Voltage Frequency ◽  
Nonlinear Compensation ◽  
Voltage Feedback ◽  
Time Division

In order to overcome the power measurement error caused by switch leakage of time division multiplier, in this paper, the mechanism of switch leakage of no-beats time division multiplier was analyzed, and switch leak was tested. On the basis of this, power compensation circuit on zero point correction based on voltage feedback and voltage frequency conversion method is designed, subsequently the compensation effect was tested respectively. Test results show that the zero compensation method based on voltage frequency conversion method is better, the zero error decreased to 0.0022%, the accuracy of the power measurement was improved.

Measurement of the Sound Field Radiated from Submerged Structure by Continuous Scanning

2013 ◽  
Vol 811 ◽  
pp. 337-340
Author(s):  
Chao Zhang ◽  
De Jiang Shang ◽  
Qi Li
Keyword(s):  
Measurement Method ◽  
Measurement Accuracy ◽  
Sound Field ◽  
Power Measurement ◽  
Discrete Point ◽  
Point Measurement ◽  
Continuous Scanning ◽  
Good Measurement ◽  
Measurement Experiment ◽  
Field Information

Distinguished from the conventional discrete-point measurement, a continuous scanning measurement method of the sound field radiated from submerged structure is proposed. By rotating the structure uniformly and continuously, the pressure signals were recorded by the hydrophones array that was located in the far field. The signals were analyzed by Fourier transform respectively, and the sound field information could be obtained by the further derivation. By using the continuous scanning measurement, the spectrum broadening phenomenon was observed and analyzed. And then the point sound source field simulation and the sound power measurement experiment were carried out to prove the reliability of this method. The results show that, compared with the conventional discrete-point measurement, the continuous scanning measurement can acquire more information in less measurement time, and reduce the measurement work greatly under good measurement accuracy.

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